Added an innocuous java BigDecimal -> scala Big...
Added an innocuous java BigDecimal -> scala Big...

Added an innocuous java BigDecimal -> scala BigDecimal implicit. Cleaned
up some documentation. Closes #2199, no review.


jvican/scala,shimib/scala,martijnhoekstra/scala,slothspot/scala,slothspot/scala,scala/scala,scala/scala,felixmulder/scala,shimib/scala,martijnhoekstra/scala,martijnhoekstra/scala,jvican/scala,jvican/scala,lrytz/scala,scala/scala,felixmulder/scala,felixmulder/scala,shimib/scala,slothspot/scala,shimib/scala,lrytz/scala,felixmulder/scala,felixmulder/scala,lrytz/scala,martijnhoekstra/scala,felixmulder/scala,jvican/scala,lrytz/scala,felixmulder/scala,slothspot/scala,scala/scala,slothspot/scala,slothspot/scala,scala/scala,jvican/scala,shimib/scala,jvican/scala,slothspot/scala,shimib/scala,scala/scala,martijnhoekstra/scala,jvican/scala,martijnhoekstra/scala,lrytz/scala,lrytz/scala